unushonest
unushonest unushonest
  • 01-08-2022
  • Mathematics
contestada

Find the surface area of the composite figure.
8 cm
6 cm
7 cm
8 cm
SA =
6 cm
[?] cm²
9 cm
6 cm

Find the surface area of the composite figure 8 cm 6 cm 7 cm 8 cm SA 6 cm cm 9 cm 6 cm class=

Respuesta :

mathstudent55
mathstudent55 mathstudent55
  • 01-08-2022

Answer:

382 cm²

Step-by-step explanation:

Front face + Back face:

A = 2(a + b)h/2

A = 2(14 cm + 8 cm)(7 cm)/2

A = 154 cm²

Left face:

A = 7 cm × 6 cm = 42 cm²

Right face:

A = 9 cm × 6 cm = 54 cm²

Bottom face:

A = 14 cm × 6 cm = 84 cm²

Top face:

A = 6 cm × 8 cm = 48 cm²

Total surface area =

= (154 + 42 + 54 + 84 + 40) cm²

= 382 cm²

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